Entropy Technology & Environmental Consultants, Inc. (ETEC)

Refinery Case Study


Tangential Refinery Gas Fired Boiler
NOx Controls Used: IFGR

This refinery client had to reduce their NOx emissions below 0.1 lb/mmbtu. The refinery installed a Patented ETEC IFGR NOx Control system, designed to provide 15% flue gas recirculation flow, on one of their boilers, a combustion engineering 550 klb/hr tangential refinery gas fired boiler. The subsequent IFGR operation demonstrated that the NOx emissions were easily reduced below the required limit. As a result, the client had ETEC’s Patented IFGR NOx Control systems installed on the remaining eight boilers, similar to those shown in the photograph below, with typical NOx emissions reduction levels of 75% shown in the figure below.

Refinery Case Study

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